Set current scala version to 2.11.2. Added shiro and commons dependencies for encryption/decryption services
Added key for aes encryption as part of config
Added test for seriaizer using AES encryption
Helper functions for encoding/decoding
Selecting crypto serializer based on config params
Added LZ4+AES and Zip+AES serializers
Added test for LZ4+AES and Zip+AES serializers